I am generating XSD from the below class. How do I make the FirstName and LastName attributes "Required" when it generates the xsd.

<Serializable()> _
<XmlRoot("Persons")> _
Public Class Persons

    Public Sub New()
        Items = New List(Of PersonsDetails)()
    End Sub

    Private _Items As List(Of PersonsDetails)
    <XmlElement("Person")> _
    Public Property Items() As List(Of PersonsDetails)
        Get
            Return _Items
        End Get
        Set(ByVal value As List(Of PersonsDetails))
            _Items = value
        End Set
    End Property
End Class

Public Class PersonsDetails

    Private _fName As String
    Private _lName As String
    Private _city As String
    Private _state As String
    Private _id As Integer

    <XmlAttribute("ID")> _
    Public Property ID() As Integer
        Get
            Return _id
        End Get
        Set(ByVal value As Integer)
            _id = value
        End Set
    End Property

    <XmlAttribute("FirstName")> _
   Public Property FirstName() As String
        Get
            Return _fName
        End Get
        Set(ByVal value As String)
            _fName = value
        End Set
    End Property

    <XmlAttribute("LastName")> _
    Public Property LastName() As String
        Get
            Return _lName
        End Get
        Set(ByVal value As String)
            _lName = value
        End Set
    End Property

    <XmlAttribute("City")> _
    Public Property City() As String
        Get
            Return _city
        End Get
        Set(ByVal value As String)
            _city = value
        End Set
    End Property

    <XmlAttribute("State")> _
    Public Property State() As String
        Get
            Return _state
        End Get
        Set(ByVal value As String)
            _state = value
        End Set
    End Property
End Class

Hi,
//u may use ISnullable=True
http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlrootattribute.aspx

http://msdn.microsoft.com/en-us/library/bfdchewb(VS.71).aspx

Check teh above link...

Or

u may also Use Xsd.exe..

http://msdn.microsoft.com/en-us/library/x6c1kb0s(VS.71).aspx

That did not work. Below is the XSD that gets generated programmatically (I am not using xsd.exe) using the above class. I want the FirstName and LastName attributes to be "required" like the ID attribute?

<?xml version="1.0" encoding="utf-8"?>
<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Persons" nillable="true" type="Persons" />
  <xs:complexType name="Persons">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" name="Person" type="PersonsDetails" />
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="PersonsDetails">
    <xs:attribute name="ID" type="xs:int" use="required" />
    <xs:attribute name="FirstName" type="xs:string" />
    <xs:attribute name="LastName" type="xs:string" />
    <xs:attribute name="City" type="xs:string" />
    <xs:attribute name="State" type="xs:string" />
  </xs:complexType>
</xs:schema>

There is nothing you can do with ASMX technology to make a reference type emit "required" for an attribute, or minOccurs="1" for an element.

You can do this using the Data Contract Serializer with WCF. You may want to plan on moving to WCF: see ASMX Web Services are a “Legacy Technology”.

hshah79:

That did not work. Below is the XSD that gets generated programmatically (I am not using xsd.exe) using the above class. I want the FirstName and LastName attributes to be "required" like the ID attribute?

<?xml version="1.0" encoding="utf-8"?>
<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Persons" nillable="true" type="Persons" />
  <xs:complexType name="Persons">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" name="Person" type="PersonsDetails" />
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="PersonsDetails">
    <xs:attribute name="ID" type="xs:int" use="required" />
    <xs:attribute name="FirstName" type="xs:string" />
    <xs:attribute name="LastName" type="xs:string" />
    <xs:attribute name="City" type="xs:string" />
    <xs:attribute name="State" type="xs:string" />
  </xs:complexType>
</xs:schema>

What R U trying May not Posssible.

http://stackoverflow.com/questions/646216/in-xsd-how-can-i-define-two-different-elements-with-the-same-name

Check The above Link for Ur Solution.

I don't see how that addresses his issue at all. He wants to make an attribute be required.

I am still waiting for a satisfactory solution on how to make an attribute to be "required"?

As I said, it is not possible.